1964  Sixpence British | British  Sixpence 1964

1964 Elizabeth II British  Sixpence Coine 1964

The coin was made from silver from its introduction in 1551 to 1947, and thereafter in cupronickel. 

Obverse: Elizabeth II laureate bust right 

Reverse: Flora; leek, rose thistle and shamrock 
Edge: Reeded

The silver content was reduced from 92.5% to 50% in 1920. Telling the difference comes from experience, as the hardness of the metal changed making the strike look slightly different.

The sixpence (6d;), sometimes known as a tanner or sixpenny bit, was a coin worth one-fortieth of a pound sterling, or six pence. It was first minted in the reign of Edward VI and circulated until 1980. Following decimalisation in 1971 it had a value of 2 1⁄2 new pence. 

Sixpences were originally supposed to be demonetized upon decimalisation in 1971. However, they remained legal tender until 30 June 1980.